/*-
 * Public Domain 2014-2019 MongoDB, Inc.
 * Public Domain 2008-2014 WiredTiger, Inc.
 *
 * This is free and unencumbered software released into the public domain.
 *
 * Anyone is free to copy, modify, publish, use, compile, sell, or
 * distribute this software, either in source code form or as a compiled
 * binary, for any purpose, commercial or non-commercial, and by any
 * means.
 *
 * In jurisdictions that recognize copyright laws, the author or authors
 * of this software dedicate any and all copyright interest in the
 * software to the public domain. We make this dedication for the benefit
 * of the public at large and to the detriment of our heirs and
 * successors. We intend this dedication to be an overt act of
 * relinquishment in perpetuity of all present and future rights to this
 * software under copyright law.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
 * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 */
#include "test_util.h"

/*
 * JIRA ticket reference: WT-2695 Test case description: Smoke-test the CRC.
 */

static inline void
check(uint32_t hw, uint32_t sw, size_t len, const char *msg)
{
    testutil_checkfmt(hw == sw ? 0 : 1,
      "%s checksum mismatch of %" WT_SIZET_FMT " bytes: %#08x != %#08x\n", msg, len, hw, sw);
}

#define DATASIZE (128 * 1024)
int
main(int argc, char *argv[])
{
    TEST_OPTS *opts, _opts;
    WT_RAND_STATE rnd;
    size_t len;
    uint32_t hw, sw;
    uint8_t *data;
    u_int i, j;

    opts = &_opts;
    memset(opts, 0, sizeof(*opts));
    testutil_check(testutil_parse_opts(argc, argv, opts));
    testutil_make_work_dir(opts->home);
    testutil_check(wiredtiger_open(opts->home, NULL, "create", &opts->conn));

    /* Initialize the RNG. */
    __wt_random_init_seed(NULL, &rnd);

    /* Allocate aligned memory for the data. */
    data = dcalloc(DATASIZE, sizeof(uint8_t));

    /*
     * Some simple known checksums.
     */
    len = 1;
    hw = __wt_checksum(data, len);
    check(hw, (uint32_t)0x527d5351, len, "nul x1: hardware");
    sw = __wt_checksum_sw(data, len);
    check(sw, (uint32_t)0x527d5351, len, "nul x1: software");

    len = 2;
    hw = __wt_checksum(data, len);
    check(hw, (uint32_t)0xf16177d2, len, "nul x2: hardware");
    sw = __wt_checksum_sw(data, len);
    check(sw, (uint32_t)0xf16177d2, len, "nul x2: software");

    len = 3;
    hw = __wt_checksum(data, len);
    check(hw, (uint32_t)0x6064a37a, len, "nul x3: hardware");
    sw = __wt_checksum_sw(data, len);
    check(sw, (uint32_t)0x6064a37a, len, "nul x3: software");

    len = 4;
    hw = __wt_checksum(data, len);
    check(hw, (uint32_t)0x48674bc7, len, "nul x4: hardware");
    sw = __wt_checksum_sw(data, len);
    check(sw, (uint32_t)0x48674bc7, len, "nul x4: software");

    len = strlen("123456789");
    memcpy(data, "123456789", len);
    hw = __wt_checksum(data, len);
    check(hw, (uint32_t)0xe3069283, len, "known string #1: hardware");
    sw = __wt_checksum_sw(data, len);
    check(sw, (uint32_t)0xe3069283, len, "known string #1: software");

    len = strlen("The quick brown fox jumps over the lazy dog");
    memcpy(data, "The quick brown fox jumps over the lazy dog", len);
    hw = __wt_checksum(data, len);
    check(hw, (uint32_t)0x22620404, len, "known string #2: hardware");
    sw = __wt_checksum_sw(data, len);
    check(sw, (uint32_t)0x22620404, len, "known string #2: software");

    /*
     * Offset the string by 1 to ensure the hardware code handles unaligned reads.
     */
    hw = __wt_checksum(data + 1, len - 1);
    check(hw, (uint32_t)0xae11f7f5, len, "known string #2: hardware");
    sw = __wt_checksum_sw(data + 1, len - 1);
    check(sw, (uint32_t)0xae11f7f5, len, "known string #2: software");

    /*
     * Checksums of power-of-two data chunks.
     */
    for (i = 0, len = 512; i < 1000; ++i) {
        for (j = 0; j < len; ++j)
            data[j] = __wt_random(&rnd) & 0xff;
        hw = __wt_checksum(data, len);
        sw = __wt_checksum_sw(data, len);
        check(hw, sw, len, "random power-of-two");

        len *= 2;
        if (len > DATASIZE)
            len = 512;
    }

    /*
     * Checksums of random data chunks.
     */
    for (i = 0; i < 1000; ++i) {
        len = __wt_random(&rnd) % DATASIZE;
        for (j = 0; j < len; ++j)
            data[j] = __wt_random(&rnd) & 0xff;
        hw = __wt_checksum(data, len);
        sw = __wt_checksum_sw(data, len);
        check(hw, sw, len, "random");
    }

    free(data);
    testutil_cleanup(opts);
    return (EXIT_SUCCESS);
}
